"Studying burns a surprisingly high number of calories, so your diet needs to be based around slowly-digested wholegrain carbs and nutrient rich foods, including brightly coloured vegetables," says Burrell. Adding as many different coloured vegetables to your plate as possible is a pretty easy way to make sure you're getting enough nutrients to fuel your brain and body.

If you can, try to avoid high-sugar snacks like banana bread, muffins, and chocolate.

"While coffee can be a better choice for some people at times, caffeine can affect your sleep, which is when your brain should be recovering from a day of studying," says Crowe. "Black and green tea are both much lower in caffeine than coffee."